package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //添加查询条件，根据分类id进行查询菜品数据(注意数据库表里关联的id)所以是用id
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);
        //查询是否有关联字段(是否能查出值)
        int count1 = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (count1 > 0) {
            throw new CustomException("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常

        }


        //添加查询条件，根据分类id进行查询菜品数据(注意数据库表里关联的id)所以是用id
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        //查询是否有关联字段(是否能查出值)
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (count2>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");//已经关联菜品，抛出一个业务异常
        }
        //正常删除分类
        super.removeById(id);//? 这个super方法是什么方法?/iservice 里的方法////
    }
}
